Improvements to ops page

Fixes [MLHR-1555](https://malhar.atlassian.net/browse/MLHR-1555).

- Removed dashboard functionality
- Added config issues
- Added toggleText directive (ended up not using, but this will be useful)
- Added dtSpinner directive

![mlhr-1555](https://cloud.githubusercontent.com/assets/1390651/4905234/ff4db2c2-644d-11e4-8a81-e140ebcd6ff8.gif)